Base adapter subclasses which take some of the boilerplate out of displaying a list of items

BaseListAdapter.java

import android.widget.BaseAdapter;

import java.util.List;

public abstract class BaseListAdapter<DataType> extends BaseAdapter {

    private List<DataType> mItems;

    @Override
    public final int getCount() {
        return mItems == null ? 0 : mItems.size();
    }

    @Override
    public final DataType getItem(int position) {
        return mItems.get(position);
    }

    public final void populate(List<DataType> items) {
        mItems = items;
        notifyDataSetChanged();
    }
}

BaseViewConvertingAdapter.java

import android.view.View;
import android.view.ViewGroup;

public abstract class BaseViewConvertingAdapter<DataType, ViewType extends View> extends BaseListAdapter<DataType> {

    protected abstract ViewType createView(ViewGroup parent);

    protected abstract void populateView(DataType data, ViewType view);

    @Override
    public final View getView(int position, View convertView, ViewGroup parent) {
        final ViewType view;
        if (convertView == null) {
            view = createView(parent);
        } else {
            view = (ViewType) convertView;
        }

        populateView(getItem(position), view);

        return view;
    }

}

Example.java

public class PersonAdapter extends BaseViewConvertingAdapter<Person, TestListItem> {
    public PersonAdapter() {
        populate(Arrays.asList(
                new Person("john smith", 40),
                new Person("dave smith", 40),
                new Person("daniel smith", 40),
                new Person("greg smith", 40),
                new Person("tom smith", 40)
        ));
    }

    @Override
    protected PersonListItem createView(ViewGroup parent) {
        return PersonListItem.inflate(parent, PersonListItem.class);
    }

    @Override
    protected void populateView(Person data, PersonListItem view) {
        view.populate(data);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }
}